Thanks! I thought it would be a cool design, especially for taking camping or backpacking.
That's a fabulous idea!! Most people aren't aware that the bottoms of ceramic mugs make a great alternative sharpener and they actually work pretty decent unless your blade is really battered badly. Or have a ceramic ring on the bottom with one side being "Medium/Gray" and the other side being "Fine/White". That way you could have a coffee mug and a touch up sharpener all in one.
This is such a huge thing now. I have a Contigo cup I use for hot or cold just because it doesn't spill. So long as it isn't cheap quality I'd buy one.